“In a variety of ways Amazon and the other big three players have distanced themselves from the competition in this market and continue to widen the gap,”

So Amazon is now on 32% of IaaS market growing 53% a year
and Microsoft is on 12% growing 100% a year,
and Google is on 5% now growing 162% a year.

Since Google and Microsoft are growing faster, at some point they may catch up with Amazon.
We could use regression to predict when that could be.
Question is, is the rate of growth linear, polynomial, exponential? Need more data.

It is worth mentioning that better option for many users is PaaS cloud,
where Azure & Google are leaders and AWS is much less.
(Docker) Containers will likely end up being optimal way of deploying apps.